Stop-lffotiom



L. MORIN.

smP Mon-0N FOR KNITIING MACHINES.

APPLICATION FILED JULY 18- 1917- v Patented Nov. 25, 1919.

3 SHEETS-SHEET I.

I Zeom'da wrrusss. I 8 5 a ATTORNEY L. MORIN.

STOP MOTION FOR KNITTING MACHINES.

APPLICATION FILED JULY 18. I917- Patented Nov. 25, 1919.

3 SHEETS-SHEET 2- 5? 36 INVENTOR r257?) AT'I'oRNEY I I I WlTNESSES 8. Q. 6%

L. MORIN.

STOP MOTION FOR KNITTING MACHINES.

APPLICATION man JULY 18. 1911.

1,323,087., 7 Patented Nov. 25, 1919.

3 SHEETS-SHEET 3.

INVENTDR' Zeonzdas .il forw v 7%. l BY LEONIDAS MORIN', 0F MANCHESTER, NEW HAMPSHIRE.

STOP-MOTION FOR KNITTING-MACHINES.

Specification of Letters Patent.

Patented Nov. 25, 1919.

Application filed July 18, 1917. SerialNo. 181,402.

To all whom it may concern:

Be it known that I, LEONIDAS MORIN, a citizen of the United States, residing at Manchester, in the county of Hillsborough and State of New Hampshire, have invented new and useful Improvements in Stop- Motions for Knitting-Machines, of which the following is a specification.

This invention relates to stop motions for knitting machines, and one of the objects is to provide a suflicient length. of thread when the latter fails to feed properly from the bobbin, with means for releasing that portion of the thread being fed, whereby time is afforded for stopping the machine auto matically before the thread breaks.

A further object is to provide for stopping the machine automatically when the thread on the bobbin or cone is exhausted, by placing in operation certain elements of the mechanism serving to stop the machine under the circumstances first mentioned.

A further object is to provide in a stop motion of the character indicated an upper series of arms normally holding the disengaging apparatus out of operation, but automatically operated when undue tension is placed on the thread, and a lower series of arms placed in operation when the thread fails because of exhausting the bobbin or cone, at which time certain thread su ported devices are released by dropping t e thread.

A still further object is to provide a device which may readily be rethreaded without loss of time and which shall be simple in construction and unusually effective in operation. a

With the foregoing and other objects in View, the invention consists in the novel construction, combination and arrangement of elements hereinafter described and claimed.

Figure 1 is a view of the device in side elevation. I V

Fig. 2 is a view in vertical section. I

Fig. 3 is a further view in vertical section, looking from another direction. a I

I Fig. 4 is a horizontal section on line-4:4: of Fig. 2.

Fig. 5 is a horizontal section on line 5-5 of Fig. 2. I

Fig. 6 is a fragmentary view in vertical section showing the movement of certain of the elements illustrated in Figs. 1 and 2.

In the drawings I have illustrated a device including four arms for carrying the threads but it will be understood that any suitable number of arms may be employed. The proportions of the construction illustrated are such that eight arms may be proyided instead of four as shown. The device 1s mounted about four or five feet above the knitting machine and includes an outer casing 10 carried upon a base 12 which is supported on a standard 14, said base 12 being provided with a socket member 15 into which is threaded a bolt or set screw 16 adapted to engage the upper end of the standard and hold the mechanism in proper position.

The manner of connecting the stop motion with the knitting machlne proper may vary to a certain extent depending upon the type of machine with which the stop motion is to be used. I have shown conventionally a standard or member 18 on which is mounted a bell crank lever 19 pivoted at the point 20 and having its lower end connected with a bar 21 which may be slotted at one end as at 22 for connection with devices leading to the knitting machine proper. Bell crank lever 19 has pivotal and adjustable connection with a vertically extending rod 23 which is adapted to engage any of the apertures 24: in said lever This rod 23 is connected with a vertically slidable bar 25 forming a portion of the stop motion proper and which will be referred to more particularly in the following description' I The thread from the bobbin or cone is designated 30 and passes through an eye slide formed of loped wire and designated 31, this thread guiding member being supported by the end of arm 32 pivoted at 33 to a bracket 34 carried upon the upper and outer portion .of the casing. This arm 32 extends inwardly toward the center of the casing 10 and is held in normal position by means of a spring 36 connected with an annular member or ring 37 mounted on the inner side of the casing and supported therein by means of brackets 38 passing through slots 39 in the casing, said devices 38 being engaged by screws passing into the wall of the casing. This ring 37 provides means for securing the ends of the spring 36 connected with certain of the arms 32. Other arms 32 may be connected by means of similar springs 36 with a ring 40 similarly mounted with reference to the casing.

Theoperation of arms 32 causes the eleration of plate l3 carrying on its lower side This plate has connection by a wire or the like 47 with a latch 18 pivotally mount ed at 19. This member 48 is notched at the point 50 and engages the upper end of a trigger or the like having the form of a bell crank lever and designated 51, this device being pivotally mounted at 1116390111552 and having an offset end 53 which is engaged by a flat spring 5 1 tending to hold'the lower end of the trigger upwardly. Element 51 projects under and engages an offset portion 5 1 on an angular arm 55, having the form of a bell crank lever and adapted for movement'about its pivotal point 56. The lower arm of the bell crank lever is notched at 57 and the notched portion engages a pin 58 carried by vertically movable bar 25 controlling mechanism for directly stopping the knitting machine.

Rigidly connected with vertically sliding bar 25 is a horizontally extending arm 60 provided with a hook portion 61, the arm extending transversely -with reference to a vertical stationary member 62 comprising a portion of the frame which mounts the operative elements just described. Conncted with the lower end of hell crank lever 51 isv a wire or the like designated 65whieh1passes downwardly through the hook 61 and is adapted to engage or hook,

The frame of which vertical member 62 forms a part also includes a horizontally extending member 66 on which the bell crank' from the lowerend thereof and secured to the base 12 of thecasing. The vertically sliding member 25 is under the influence of a coiled spring 70 secured The thread 30 passing through members 31 passes thence to pivoted hooks 75 each passing through van aperture 76 in an arm 32, and the thread passes thence through a rack 7 7 and a fork 7 8,.the thread serving to hold fork 78 and its arm 7 9 in an upperposition unclernormal conditions. The release of fork 78- by the thread and the consequent radially extending arm or lever 81 which is fulcrumed at 82 in an annular member 83 mounted above the base plate 12. The outto be engaged by said;

. ward and downward movement of arm 79 depresses the outer end of the lever 81, ele

vating the inner end and also elevating a plate 84: adapted for movement in an upward direction and when so moved adapted to engage the. transverse member 60 previously described. Plate 84- is provided with a tubu lar guiding member 85 operating upon vertical member 62 of the stationary frame. 7

The release of fork'78 and arm 79 by the thread produces upward or disengaging 7 movement of the latch 18 through'the'melatch at the point 88. I

When the thread or yarn fails to feed properly and tension is placed thereon, the thread pulls on the outer end of arm 32 and causes the hook 75 to move downwardly, thus freeing the thread and allowing it to slide over the upper and outer portion 7 7 of rack 77 allowing it to slip to the side sothat it may escape the eye member 31 and furnish sufiicient length of thread to permit the ma chine to be stopped without breaking said thread. i j

The downward pull on the outer end of lever 32 will elevate the plate 43 and'will release the latch 18 as before indicated, thus freeing bell crank lever 51 and causing it to operate lever 54 and release vertical sliding 'medium of connecting rod or wire 87.

Wire 87 has an offset 87 engaged by offset 86 on member 85 for producing themove ment above indicated. I r

The arms 79 are raised to ajposition to permit rethreading when the plate-84 is depressed by the downward movement of bar 25 and transverse member 60.

What, is claimed is: V V

'1. In a stop motion for a knitting Ina-- chine, a slidably mounted bar, operating means connected with said bar and with the driving means of said machine, a'pivotally mounted lever, an'engaging device thereon for retaining the bar in a. given position, means including apivotally mounted latch for controlling the movement of the lever,

a plurality of pivotally mounted arms under the control of the thread suppliedto the machine, and means. operated by the arms for controlling the latch, a casing for housing certain of the operativeelements specified, an adjustable annular member mo unted within'the casing, and springs'connecting the annular member with the arms.

2. In a stop motlon for 'a knitting-maehlne, a shdably mounted bar, connecting means between the bar and the driving mounted lever engaging the lever first mentioned, a latch controllingthe operation of the second lever, and a plurality of series of thread controlled members for controlling the operation of the latch, one or" said series including a plurality of pivotally mounted arms, a casing with reference to which the arms are pivotally supported, adjustable annular members Within the casing, and springs connecting the annular members with the pivoted arms.

3. In a stop motion for a knitting machine, a plurality of pivotally mounted levers, certain of the arms of which are adapted to engage, an engaging device carried by an arm of one of said levers, a slidable member adapted to contact with the engaging device, a latch controlling the operation of the other of said levers, and a plurality of series of thread controlled arms for controlling the operation of the latch, one of said series including a plurality of pivotally mounted arms, a casing with reference to which the arms are pivotally sup ported, adjustable annular members within the casing, and springs connecting the annular members with the pivoted arms.

a. In a stop motion for a knitting machine, a slidable bar, connecting means between the bar and the driving means for the machine, a plurality of pivotally mounted bell crank levers, certain of the arms of said levers being adapted to engage, a spring engaging an arm of one of said levers for moving the lever last named to operative position, a latch for controlling the position of the other of said levers, and independently operated means for controlling the position of the latch, said means last named including pivoted and stationary thread guiding and retaining elements, the upper portion of the stationary elements being inclined,

independent pivoted spring-held arms and devices associated therewith for supporting a thread, the thread being released under excessive tension and guided to a slack position by the inclined portions of the stationary elements.

5. In a stop motion, a plurality of pivotally mounted arms, a casing into which the inner ends of the arms extend in a radial direction, an element engaged by the approaching ends of the several arms, means directly actuated by the element thus engaged for stopping the machine, a plurality of looped members for supporting threads on the ends of said arms, a pivotally mounted hook projecting loosely through each arm for supporting the thread and adapted to release said thread upon the movement of the arm on its pivot, and a thread guiding member mounted adjacent to said pivotally mounted hook and aiding in the release of a given length of thread passing from the thread supporting devices first mentioned and thence to the knitting machine.

6. In a stop motion, a plurality of series of thread controlled arms, a reciprocable spring controlled member adapted for connection with the driving means of a knitting machine, means for holding said member in a position permitting the operation of the knitting device, independent means under the control of each series of arms for releasing said spring controlled member and stopping the machine, said means last mentioned including a plurality of bell-crank levers operating in parallel planes and reversely mounted, one of the levers including an offset portion contacting with the other lever.

In testimony whereof I affix my signature.

LEONIDAS MORIN. 

